vande poele



(No Model.) 2 Sheets-Sheet 1 0. J. VAN-DE POELE.

DYNAMO ELECTRIC MACHINE. No. 247,278. Petented Sept. 20,1881.

(No Model.) 2 Sheets-Sheet 2-.

O. J. VAN DE POELE.

DYNAMO ELECTRIC MACHINE.

No. 247,278. Patented Sept. 20,1881.

UNITED I STATES PATENT OFFICE.

CHARLES J. VAN DE POELE, OF CHICAGO, ILLINOIS.

DYNAMO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 247,278, datedSeptember 20, 1881.1

' Application filed May 25, 1881. (No model.)

To all whom it may concern:

Be it known that I, CHARLES J. VAN DE POELE, of Chicago, in the countyof Cook and State of Illinois, have invented an Improvement inDynamo-Electric Machines, of which the following is a specification.

My invention relates to new and useful improvements in the constructionof electric generators, whereby a large number of independent currentsof an alternating'character may be produced.

The invention consists in the peculiar construction of parts and theircombinations, as more fully hereinafter described.

Figure 1 is a side elevation of my improved machine complete and readyfor operation. Fig. 2 is a vertical central longitudinal section. Fig. 3is a rear-end view, showing commutatorring and insulated brush andholder to send current through electro-magnet in case a second orseparate dynamo-machine is employed to saturate said magnets. Fig. 4. isa front-end view, showing coils, brushes and holders, and commutator, bymeans of which the necessary currents are collected to keep up magnetismin large magnets, making the machine selflcontained-that is, notrequiring a separate dynamo to keep up the currents in the revolvingmagnets. Fig. 5 is a cross-section, showing inducing-magnets, inducedcoils, ring to which the induced coils are secured, and the hub carryingthe large electro-magnets, of which the hub forms a part.

In the accompanying drawings, which form a part of this specification, AA and B B represent the four large inducing-magnets, each being secured'to the hub H, which is secured upon a shaft, I, journaled in suitablebearings, J, at each end, and driven by a belt upon the pulley K.

0 represents the armature-plates, around which are wound the wire-coils0. These plates, carrying said coils, are secured to the rings D bymeans of screws a, as shown, so that the rings, with an even number ofarmature-coilssay two or any multiple of two-will form a circularchamber, within which the shaft carrying the magnets may revolve.

E are circular plates, of wood or other nonconducting substance, securedto the end of the armatures, covering the coils thereof, and carryingbinding-posts L for the induced coils. There are two of thesebindingposts for each one of the armature-coils.

M is the commutator.

N N are brush-holders and brushes, and in Fig. 4 the wire-connectionsare shown between two opposite coils of the armature and thebrush-holders.

0 represents a commutator-rin g, and 0 an insulated brush-holder andbrush, upon the rear end of the machine, designed to be employed insending currents through the electromagnets in case a second or separatedynamo is used to saturate said magnets.

In practice it is well known that a large fieldmagnethavingonce beenmagnetizedwillretain asmall portion ofwhatis called remnant magnetism.Now, on revolving said magnets in frontofor along the sides of the coresand coils of thearmature,weak currents will be developed in said coils,but in alternate directions. By properly connecting said coils to thebrush-holders and brushes N N, as shown in Fig. 4, said currents aremade to run in one direction, as all the coils of the magnets areconnected with the commutator M, one terminal with one half of thecommutator and the other terminal with the other half of saidcommutator. The currents thus being sent in one direction through thelarge magnets, theirpower will beincreased and act more powerfully onthe coils of the armature. These,intheirturn,willsendcurrents ofcorresponding strength into the large magnets, and so on, keeping up therequired magnetism in said field-magnets as long as the machine is inoperation. This explains how the apparatus is made to be self-sustained,requiring no special or separate source of electricity to saturate therevolving field.

It will be very easily understood that in all the independent coilscurrents of alternate directions will be generated as long as the fieldis revolving in connection with said coils O 0, Fig. 4, and that manycombinations can be made with induced coils and currents, furnishin gcurrents of more or less power, as required.

On an examination it will be found that this machine is to a certainextent an inverse construction of the dynamo-machine as patented IOG tome on September 21, 1880, in patent numbered 232,574. The armature insaid patented machine revolves, and the field is stationary, whereas inthe present construction I revolve the field within the armature, whichis sta tionary.

The machine herein described, in addition to keeping up its ownmagnetism, is capable of giving off a large number of independentcircuits to be used for lighting or for other purposes. By making therevolving field so as to present only one positive (north) and onenegative (south) pole I obtain one very powerful magnet, and, as ittakes rather a long time to saturate any other electro-magnet in thevicinity of an inducing-magnet, by this system I give the induced coilsthe same time to acquire their saturation as in the case of thestationary field. This is not the case, however, where theinducing-magnets are numerous and small. Another advantage I gain, sincethe apparatus is se1f-contained,is that the commutator can be made inthe simplest of the known forms.

WVhat I claim as my invention is- 1. In a dynamo'electric machine, andin combination with the rotary field-magnets A A B B thereof, thestationary and circular series of armature-magnets G, each composed of acore, 0, wound in the direction of its length and secured to two or morerings, D, surroundo ing all the magnets, said armature-cores havingtheir narrow edges adjoining each other, substantially as and for thepurpose specified.

2. In a dynamo-electric machine, the fieldmagnets A A B B, eachconsisting of a long fiat core attached radially to the revolving shaft1 in the direction of its greatest length, and provided with a curvedpolar face projecting past the core in all directions, in combinationwiththestationary armatureanagnetsOO, both the armature and the fieldmagnets being wound with wire in the direction oftheir length,substantially as and for the purpose specified.

3. In a dynamo-electric machine, and in combination with the stationaryarmature-cores G thereof, the circular flanged insulating-rings E andbinding-posts L, said rings being constructed to protect the ends of thearmaturecoils and to sustain the binding-posts ot' the coils,substantially as set forth.

CHARLES J. VAN DE IOELE. Witnesses:

JOHN ScULLY, ALLEN A. GRIFFITH, Jr.

